About variable initialization

epsilong123

For example, int is initialized to 0
So why is AnsiString type initialization good?
Some books write AnsiString as = ""; others write AnsiString as = NULL;
There are also some structure variables, such as handle variables. Why is this kind of initialization necessary?

xietao405

Some books write initialization AnsiString as=""; others write AnsiString as=NULL;

AnsiString a="" is slightly different from AnsiString a=NULL
It can be considered that the former is valuable, the value is empty

The handle is initialized to NULL

The structure directly struct A a={0};

epsilong123

Which one is better?

Kaysin

It doesn't matter what kind of good, habit problems, at least initialization can give you a criterion for later judgment.

delraich

Agree upstairs.

wudi180

It does not matter what is initialized to.
But AnsiString ansiTemp = "" is not the same as ansiTemp = NULL.
ansiTemp = "" There is nothing in ansiTemp. The length is 0.
ansiTemp = NULL means that ansiTemp is empty and has a length of 1.
What the initialization looks like only determines how to judge whether it is initialized when the following program runs.